powerpc/mm: Move the DSISR_PROTFAULT sanity check

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This has a page of comment explaining what's going on right in
the middle of do_page_fault() which makes things a bit hard to
follow. Move it to a helper instead. Also do the test earlier
as there's no point waiting until after we found the VMA.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Benjamin Herrenschmidt 2017-07-19 14:49:39 +10:00 • committed by Michael Ellerman

parent 04aafdc601

commit 2865d08dd9

1 changed files with 42 additions and 33 deletions

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arch/powerpc/mm/fault.c

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